Electronics and Semiconductors

Continental launches two EV battery sensors

27 May 2022
This current sensor module (CSM) provides the current and temperature information for battery safety and long-term durability. Source: Continental

Continental is expanding its automotive sensors with new offerings designed to help protect batteries inside electric vehicles.

Two new sensors have been introduced called the current sensor module (CSM) and the battery impact detection (BID) system.

The CSM measures the current of the battery and simultaneously detects temperature — protecting the battery from over-currents but also helping to retain the battery parameters by limiting aging effects. The CSM provides two types of information for battery protection as well as driving range monitoring. It is a two-channel sensor that measures current independently by integrating shunt technology and hall technology in a single unit.

Meanwhile, the BID works in combination with a lightweight structure to detect underfloor impacts and alerts the driver if they need to stop for repairs. The sensor helps drivers determine whether an impact at high speed or a low-speed ground contact may have damaged the battery. Compared to current metal underfloor protection, Continental said it can save up to 50% of the weight.

“Vehicle electrification brings new use cases and thus opens up more opportunities to our sensor activities, because an electric car has all the sensor needs a conventional car has – and more,” said Laurent Fabre, head of passive safety and sensorics segment at Continental. “Protecting the battery and retaining its performance, for instance, are two additional tasks in electrified vehicles. The current sensor module and battery impact detection solutions serve both purposes.”

The CSM can be calibrated up to 2,000 amps with better than 1% accuracy on the shunt channel and a 3% accuracy on the hall channel. It also supports a temperature range between negative 40° C and 125° C. Both current measurement technologies allow full galvanic separation and the input is provided via CAN interface to the battery management system.

Additionally, the CSM can help detect mechanical malfunctions that could potentially lead to a fire or damage to the lithium battery. The sensor fully supports ASIL D on system level. Continental plans to begin production on the CSM sensor this year.

To contact the author of this article, email PBrown@globalspec.com

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